Comparison of british and overseas standards for steel. Chemical composition of wrought alloy steels: British standard (S.A.E and AISI) and German (DIN and Werkstoff)

2015 ◽  
Keyword(s):  
Chemical Composition ◽  
British Standard ◽  
Alloy Steels

scholarly journals Prediction of Microstructure Constituents’ Hardness after the Isothermal Decomposition of Austenite

Metals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 180
Author(s):  
Sunčana Smokvina Hanza ◽  
Božo Smoljan ◽  
Lovro Štic ◽  
Krunoslav Hajdek
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Carbon Content ◽  
Deep Understanding ◽  
Low Alloy Steels ◽  
Isothermal Decomposition ◽  
Technical Requirements ◽  
Proposed Model ◽  
Alloy Steels ◽  
Prediction Of Mechanical Properties

An increase in technical requirements related to the prediction of mechanical properties of steel engineering components requires a deep understanding of relations which exist between microstructure, chemical composition and mechanical properties. This paper is dedicated to the research of the relation between steel hardness with the microstructure, chemical composition and temperature of isothermal decomposition of austenite. When setting the equations for predicting the hardness of microstructure constituents, it was assumed that: (1) The pearlite hardness depends on the carbon content in a steel and on the undercooling below the critical temperature, (2) the martensite hardness depends primarily on its carbon content, (3) the hardness of bainite can be between that of untempered martensite and pearlite in the same steel. The equations for estimation of microstructure constituents’ hardness after the isothermal decomposition of austenite have been proposed. By the comparison of predicted hardness using a mathematical model with experimental results, it can be concluded that hardness of considered low-alloy steels could be successfully predicted by the proposed model.

Study of the critical deformation dependence for dynamic recrystallization in low-carbon steels on the chemical composition

2020 ◽  
pp. 74-79
Author(s):  
V.N. Gadalov ◽  
V.V. Shkatov ◽  
Yu. V. Skripkina ◽  
A.E. Gvozdev
Keyword(s):  
Chemical Composition ◽  
Dynamic Recrystallization ◽  
Chemical Elements ◽  
Carbon Steels ◽  
Low Alloy Steels ◽  
Low Carbon ◽  
Automated Control ◽  
Critical Deformation ◽  
Alloy Steels ◽  
Improved Model

The article considers dependence of the critical deformation for dynamic recrystallization in low-alloy steels on the chemical composition. The article shows an improved model for forecasting the critical deformation for dynamic recrystallization, which allows considering the content of chemical elements in steel. The article analyzes the influence of the chemical composition of low-alloy steels on the value of critical deformation during hot deformation. The article shows that the developed mathematical model can be used in the system of automated control of the structure and properties of steels during hot rolling to forecast conditions for the development of dynamic recrystallization and to select the optimal chemical composition of steels.

STUDY OF HIGH-STRENGTH LOW-ALLOY STEEL WITH SUPER-EQUILIBRIUM NITROGEN CONTENT

2020 ◽  
pp. 3-13
Author(s):  
S.A. Krylov ◽  
◽  
A.A. Makarov ◽  
M.A. Druzhnov ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Nitrogen Content ◽  
Mechanical Characteristics ◽  
High Strength ◽  
Low Alloy Steels ◽  
Low Alloy Steel ◽  
Joint Work ◽  
Alloy Steels ◽  
High Level

In continuation of joint work of FSUE «VIAM» and IMET RAN named after Baikov, in the field of obtaining low-alloy steels with increased mechanical properties with a super-equilibrium nitrogen content, the mechanical properties, structure, and chemical composition of the obtained steel were studied. It is shown that steel 10KH3A with a super-equilibrium nitrogen content (up to 0,2) electroslag remelting under pressure DESHP-0,1 (FSUE «VIAM») provides a high level of properties (ultimate strength 1670 MPa) while maintaining high mechanical characteristics (elongation 10%, constriction 50%).

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